The rise of open-weight AI models is expected to accelerate demand for sovereign enterprise AI infrastructure, according to Australian company SCX.ai, which is preparing to become Australia's first ASX-listed pure-play sovereign AI inference infrastructure company. The company says Australia can expand AI capability by using existing data centres more efficiently rather than building ever-larger AI campuses. Nvidia chief executive Jensen Huang used his first-ever post on X to launch a campaign backing "open-weight" AI models, and within 24 hours support had doubled from 25 companies to 50, with OpenAI, Microsoft, Google, AMD, Cisco and dozens of the world's largest technology companies joining. The campaign reflects a shift where organisations seek the freedom to download, customise and run AI on infrastructure they control. SCX.ai is seeking to raise $40 million through a fully underwritten IPO ahead of its proposed ASX listing under the code SCX. Founder and chief executive David Keane said open-weight AI was changing the economics of artificial intelligence, giving businesses more choice over models while still needing secure, efficient and sovereign infrastructure to run them. Rather than developing its own foundation models, the company provides AI inference infrastructure for applications like chatbots, AI agents, document analysis and enterprise automation, running inside existing Australian commercial data centres using specialised AI processors.